Today, try doing anything other than text-only email over 56Kb dialup.
Broadband uptake enabled a new class of Internet sites and services. Google is betting that history will repeat itself by kicking speeds up by two orders of magnitude. It also has the beneficial side-effect of lighting a fire under AT&T's slothful ass.
Also keep in mind that GFiber offerings are symmetric. That means you get to upload your photos and videos at 1Gb/sec as well, and not through the 768Kb straw that DSL and cable providers decided was "good enough" for consumer-class Internet.